Center-punch



F. F. KOMATAR.

CENTER PUNCH. AEPLlCATIDN FILED MAR. 10. 1920.

1,341,373. Patented May 25, 1920.

.9 w n v fnvenior 2 FIMd/W UNITED STATE FRANK FBIDERIK KOMATAR, OF EAST MOLIN'E, ILLINOIS.

CENTER-PUNCH.

Specification of Letters Patent.

Patented May 25, 1920.

Application filed. March 10, 1920. Serial No. 364,856.

T 0 all whom it may concern:

Be it known that I, FRANK FRIDERIK Ko- MATAR, a citizen of Jugo-Slavia, residing at East Moline, in the county of Rock Island and State of Illinois, have invented certain new and useful Improvements in Center- Punches, of which the following is a specification.

This invention relates to certain new and useful improvements in center punches particularly adapted for hand actuation.

The principal object of the invention is to provide a hand operated center punch of extremely simple and durable construction so that the same may be cheaply and easily manufactured and may be continuously placed in use without detrimental effect.

A further object of the invention is to provide a center punch comprising a handle carried anvil and a yieldably mounted hammer provided with finger operated means for actuating'the same so as to cause the hammer to quickly and effectively strike the anvil for making a center mark for the usual purposes.

With the above general objects in view and others that will become apparent as the nature of the invention is better understood, the same consists in the novel form, combination and arrangement of parts hereinafter more fully described in connection with the accompanying drawing.

In the drawing wherein like reference characters indicate corresponding parts throughout the several views,

Figure 1 is a side elevational view of a center punch constructed in accordance with the present invention,

Fig. 2 is a view of the device shown in Fig. 1, partly in longitudinal section, and partly in side elevation,

Fig. 3 is a transverse sectional view taken substantially upon line IIIHI of Fig. 2,

Fig. 4 is a transverse sectional view taken substantially upon line IV-IV of Fig. 2,

Fig. 5 is a perspective view of the inner end portion of the trip lever which carries the hammer, and

Fig. 6 is a perspective view of the spring pressed sliding trip member of the punch.

Referring more in detail to the several views, the present invention embodies a handle 5 having a tapered shank 6 preferably integral with one end thereof, a transverse anvil being rigid upon the free end of the shank 6 and provided with a pointed lower end as at 8 and a flat upper end as at 9.

The handle 5 is provided with a longitudinal bore 10 which is open at the outer end of the handle 5 and which terminates adjacent the shank 6 at the inner end of the handle 5 in communication with an up wardly extending slot 11 which is provided in the handle 5. The outer end of the handle 5 is reduced and threaded as at 12 for reception of an elongated cap 13 which is of such size as to provide a chamber 14 at the outer end of the handle 5 coaxial with the bore 10 of the latter. A trip rod or member 15 is slidable longitudinally of the handle 5 within the bore 10 of the latter and has its outer end provided with a washer 16 against which the outer end of a helical compression spring 17 bears, the inner end of said spring 17 being arranged to bear upon the outer end of the handle 5 and encircling the rod 15 within the chamber 14 so as to normally yieldingly maintain the rod 15 outwardly pressed. The inner end of the trip rod 15 is reduced as at 18 and provided at its extreme inner end with an upwardly extending lug 19 normally positioned in the cutout 20 of the trip lever 21 which is pivoted at one end as at 22 within the slot 11 to the handle 5. The trip lever 21 has a hammer 23 upon the free end thereof arranged so as to strike against the upper flat face 9 of the anvil 7 when actuated as will presently become apparent.

A link or bail 24 is pivoted to the trip lever 21 adjacent the hammer 23, and the free end of a resilient leaf spring 25 is slidably disposed between the bail 24 and the lever 21 and has its free end angularly bent as at 26 so as to prevent the spring 25 from moving out of the bail 24. The other end of the spring 25 is rigidly fastened by any suitable means such as screws 27 to the handle 5 rearwardly of the slot 11 thereof, and this spring 25 normally yieldingly maintains the lever 21 inclined as shown in Figs. 1 and 2 with the hammer 23 suspended above the anvil 7 The trip rod 15 is reduced at opposite sides as at 28 intermediate its ends, and the handle 5 is provided with a transverse slot 29 communicating with the bore 10 rearwardly of the slot 11. A trigger or finger piece 30 is pivoted to the handle 5 within the slot 29 thereof as at 31, and is forked at its upper end as at 32 to engage opposite sides of the trip rod 15 where the same is'reduced as at 28. The reducing of the trip rod 15 as at 28 produces shoulders 33 which are engaged by the forked portion 32 of the trigger 30 so that when said trigger is moved rearwardly by the finger, the trip rod 15 is pressed forwardly against the action of the spring 17 so as to cause the lug 19 to swing the trip lever 21 upwardly against the action of the spring 25. When this is done the trigger 30 is immediately released and the springs 17 and 25 cooperate to an obvious extent so as to quickly move the hammer 23 downwardly for striking the upper end of the anvil 7 so as to cause the point 8 of the latter to form the desired center mark as will be apparent.

It will thus be seen that I have provided a very simple and effective form of center punch which may be cheaply and easily manufactured, easily and readily manipulated and which will be durable and eflicient in operation.

Minor changes may be made without departing from the spirit and scope of the invention as claimed.

What I claim is 1. A center punch comprising a handle having a shank at one end, a transverse anvil rigid upon the free end of said shank, a normally rearwardly spring pressed trip rod slidable longitudinally within said handle, a trip lever pivoted to said handle and operatively connected with the forward end of said trip rod whereby forward movement of the latter will cause forward swinging move ment of said trip lever, a hammer upon the free end of said trip lever above said anvil, yieldable means normally suspending said hammer in spaced relation above said anvil, and a trigger for forwardly sliding said trip rod so as to forcibly upwardly swing the trip lever and hammer whereby the latter will be forcibly returned to strike the upper end of said anvil, substantially as described.

2. A center punch comprising a handle having an open longitudinal bore, said handle being provided with an upwardly extending slot communicating with the forward end of said bore and a downwardly extending slot communicating with the intermediate portion of said bore, a trip rod slidable within said bore, a trigger pivoted to the handle within the last named slot of the latter and operatively connected with said trip rod for forwardly sliding the latter, a trip lever pivoted to the handle within the first mentioned slot of the latter and operatively connected with the forward end of said trip rod whereby forward movement of the latter will cause upward swinging movement of said trip lever, a shank upon the forward end of said handle, a transverse anvil upon the free forward end of said shank, a hammer upon the free forward end of said trip lever, and a leaf spring having its forward end connected to the trip lever adjacent the hammer and having its rear- 7 ward end rigidly attached to the handle so as to yieldably suspend the hammer above said anvil.

3. A center punch comprising a handle having an open longitudinal bore, said handle being provided with an upwardly extending slot communicating with the forward end of said bore and a downwardly extending slot communicating with the intermediate portion of said bore, a trip rod slidable'within said bore, a trigger pivoted to the handle within the last named slot of the latter and operatively connected with said trip rod for forwardly sliding the latter, a trip lever pivoted to the handle within the first mentioned slot of the latter and operatively connected with the forward end of said trip rod whereby forward movement of the latter will cause upward swinging movement of said trip lever, a shank upon the forward end of said handle, a transverse anvil upon the free forward end of said shank, a hammer upon the free forward end of said trip lever, a leaf spring having its forward end connected to the trip lever adjacent the hammer and having its rearward end rigidly attached to the handle so as yieldably to suspend the hammer above said anvil, a chambered cap secured upon the rearward end of said handle and into the chamber of which the rear end of said trip rod extends, and a sprin encircling said trip rod within said chamber for normally yieldably maintaining said trip rod rearwardly positioned.

In testimony whereof I affix my signature.

FRANK FRIDERIK KOMATAR. 

